The invention refers to operating a first node of a communication network comprising a plurality of nodes which are interconnected by communication links and wherein data traffic is provided over the communication links to provide a data stream to the nodes, wherein the first node (15) performs the steps of: detecting a data traffic interruption with respect to a second node (16), determining, if the data traffic is still received, and forwarding the data traffic to the second node (16) if the first node (15) receives the data traffic, and otherwise notifying a third node (17) of the plurality of network nodes about the data traffic interruption. The invention further refers to a corresponding node, a network and a computer program to be run in the node.